#include <stdlib.h>
#include <stdio.h>
#include "timers.h"

static char *program;

static int
usage() {
	fprintf(stderr,"Usage: %s [loops]\n",program);
	exit(1);
}

int
main(int argc, char *argv[])
{
	int i,j,num;
	double sum1,sum2,sum3,sum4,sum5,sum6,sum7,sum8;
	double time,mflop;

	program = argv[0];

	sum1 = 0.0;
	sum2 = 1.0;
	sum3 = 2.0;
	sum4 = 3.0;
	sum5 = 4.0;
	sum6 = 5.0;
	sum7 = 6.0;
	sum8 = 7.0;

	if (argc == 1) {
		while(1);
	} else if (argc == 2) {
		num=atoi(argv[1]);

		if (num <= 0) usage();

		time = CPUTIME();

		for (i=0; i<num; i++) {
			for(j=0; j<num; j++) {
				sum1 = sum1*0.5 + 10.0;
				sum2 = sum2*0.5 + 10.0;
				sum3 = sum3*0.5 + 10.0;
				sum4 = sum4*0.5 + 10.0;
				sum5 = sum5*0.5 + 10.0;
				sum6 = sum6*0.5 + 10.0;
				sum7 = sum7*0.5 + 10.0;
				sum8 = sum8*0.5 + 10.0;
			}
		}

		time = CPUTIME() - time;
	} else {
		usage();
	}

	mflop = (double)num*(double)num*16*1e-6;

	printf("%e %e %e %e %e %e %e %e\n",sum1,sum2,sum3,sum4,sum5,sum6,sum7,sum8);
	printf("time = %.3f\n",time);
	printf("%.2f MFlops\n",mflop/time);

	return 0;
}